If you look at official concepts of unarmored turians you'll see a lot more similarity. Not to mention aside from adding in a few tiny facial details, the proportions are almost perfect in the face, and the Torso also has the Carapice that Turians have around the necks.

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Looks great, but the battle mask looks rather...plain. Perhaps add some deco to that? If you look at the battle masks of Bayverse Transformers, they're almost as detailed as the actual head they cover.